docstr: Load the word dictionary.
                  
docstr_tok: ["Load","the","word","dictionary","."]
code: def __load_vocab(self, vocab_path):
      """Load the word dictionary."""
      with open(vocab_path, "r", encoding="utf-8") as fin:
          vocab_size = 0
          for line in fin.readlines():
              fields = line.strip().split("\t")
              assert len(fields) >= 2
              word = fields[1]
              self.__max_word_len = max(self.__max_word_len, len(word))
              self.__vocab.add(word)
              vocab_size += 1
  
file_path: PaddleHub/modules/text/language_model/lda_news/tokenizer.py
label_desc: Use image node_id 2 for calling the LACTokenizer obj's underlying member method code with example usage: obj.__load_vocab(vocab_path) without return types